$this->load->model(‘order_model’) reads as a convenience and is a service locator: it reaches into a global singleton, constructs whatever it finds, and attaches it to the controller by a…
A third-party widget arrives with jQuery 1.7 bundled into its own script tag, the application is on 1.11, and whichever loads second owns window.jQuery — so one of…
The grid is three classes that only work as a chain. .container supplies 15px of padding, .row cancels it with a -15px margin on each side, and .col-*…
update_option() returns false for two entirely different situations: the write failed, and the write was unnecessary. It compares the new value against the current one with === and…
save_post fires for autosaves, revisions, quick edit, bulk edit and XML-RPC as well as for someone pressing Update. None of those requests contain the fields from your meta…
Generators are usually introduced as a way to produce a sequence lazily, and the arrow is described as pointing one way. It does not: yield is an expression,…
Every CodeIgniter 2 project reaches the point where four controllers need the same authentication check. The framework has no container and no interface to implement — the extension…
Without a persistent object cache, a transient is two rows in wp_options — the value and a timeout — and expiry is checked nowhere except inside get_transient(), which…